I can't seem to get the upgrade to work. Using an OpenEVSE running 2.7.8 and connected to my home WiFi, the POST of the upgrade binary always fails. I have now tried with IE, Edge, Chrome and Firefox and they all fail.
Oops, just realized I am on 2.7.6. I do have a USB/TTL device, so I can directly program the FLASH, so I'll do that at some point. I also need to upgrade the base firmware to 5.0.1 from 4.x and that has to be done offline anyway.